Truck/SUV : 6 Ft 6 In (again, this is going to really vary depending on type of truck)

Those are fairly close in size as far as I’m aware, but things don’t really need to be exact. If they do, I suggest picking up a standard laser range finder for better accuracy.

Anyhow, I originally chose the residential door. Sighted it in, adjusted the size and boom. Came up with the range in foot an inches. Pretty close.

I took the device out to the front of my garage and decided to try it again. Sighted in the neighbors mailbox and again it gave me immediately the range.

Knowing the length of the driveway as well as the approximate size of the road in front of our place, this is pretty darn close to the actual distance.

It’s not 100% accurate, but it’ll do in a pinch. Again, if you need precise measurements, you’d better go pick up one of the laser rangefinders out there. But if you are just golfing, hiking, camping, etc, this thing will work perfect for you.